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< div class = "apiDetail" >
< div >
< h2 > < span > Function(treeId, treeNode)< / span > < span class = "path" > setting.callback.< / span > beforeAsync< / h2 >
< h3 > 概述< span class = "h3_info" > [ 依赖 < span class = "highlight_green" > jquery.ztree.core< / span > 核心 js ]< / span > < / h3 >
< div class = "desc" >
< p > < / p >
< div class = "longdesc" >
< p > 用于捕获异步加载之前的事件回调函数， < / p >
< p > 默认值： < / p >
< / div >
< / div >
< h3 > Function 参数说明< / h3 >
< div class = "desc" >
< h4 > < b > treeId< / b > < span > String< / span > < / h4 >
< p > 对应 zTree 的 < b class = "highlight_red" > treeId< / b > ，便于用户操控< / p >
< h4 class = "topLine" > < b > treeNode< / b > < span > JSON< / span > < / h4 >
< p > 进行异步加载的父节点 JSON 数据对象< / p >
< p class = "highlight_red" > 针对根进行异步加载时， < / p >
< h4 class = "topLine" > < b > 返回值< / b > < span > Boolean< / span > < / h4 >
< p > 返回值是 true / false< / p >
< p class = "highlight_red" > 如果返回 false， < / p >
< / div >
< h3 > setting & function 举例< / h3 >
< h4 > 1. 禁止 id 为 1 的父节点进行异步加载操作< / h4 >
< pre xmlns = "" > < code > function zTreeBeforeAsync(treeId, treeNode) {
return (treeNode.id !== 1);
};
var setting = {
callback: {
beforeAsync: zTreeBeforeAsync
}
};
......< / code > < / pre >
< / div >
< / div >
